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Noncontrolling Interests (Details) (USD $)	3 Months Ended
Noncontrolling Interests (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Noncontrolling Interests
Earnings (losses) attributable to noncontrolling interest before tax	$ 48,200,000	$ 22,600,000
Earnings (losses) attributable to noncontrolling interest, tax	1,400,000	300,000
Distributions paid to noncontrolling interest holders	17,942,000	19,767,000
Capital contribution from noncontrolling interests	$ 202,000	$ 1,400,000

- Definition

Cash outflow in the form of ordinary dividends to noncontrolling interests, generally out of earnings.

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- Definition

The cash inflow contributed by noncontrolled interest that purchase additional shares or otherwise increase their ownership stake in a subsidiary of the entity.

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